:root{--primary-color: #006aff;--primary-hover: #0056d2;--bg-color: #f4f7f9;--card-bg: #ffffff;--text-color: #333;--text-muted: #666;--border-color: #e1e4e8;--success-color: #28a745;--error-color: #dc3545;--shadow: 0 4px 6px rgba(0, 0, 0, .1);--radius: 8px}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;background-color:var(--bg-color);color:var(--text-color);line-height:1.5}.app-container{min-height:100vh;display:flex;flex-direction:column}.navbar{background-color:var(--card-bg);padding:1rem 2rem;box-shadow:0 2px 4px #0000000d;display:flex;justify-content:space-between;align-items:center}.navbar h1{margin:0;font-size:1.25rem;color:var(--primary-color)}.main-content{flex:1;padding:2rem;max-width:1200px;margin:0 auto;width:100%;box-sizing:border-box}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);padding:2rem;margin-bottom:2rem}.form-group{margin-bottom:1.5rem}label{display:block;margin-bottom:.5rem;font-weight:600;font-size:.9rem}input,select{width:100%;padding:.75rem;border:1px solid var(--border-color);border-radius:var(--radius);font-size:1rem;box-sizing:border-box;transition:border-color .2s}input:focus,select:focus{outline:none;border-color:var(--primary-color)}button{background-color:var(--primary-color);color:#fff;border:none;padding:.75rem 1.5rem;border-radius:var(--radius);font-weight:600;cursor:pointer;transition:background-color .2s}button:hover{background-color:var(--primary-hover)}button:disabled{background-color:var(--text-muted);cursor:not-allowed}button.secondary{background-color:transparent;border:1px solid var(--border-color);color:var(--text-color)}button.secondary:hover{background-color:var(--bg-color)}.table-container{overflow-x:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:1rem;border-bottom:1px solid var(--border-color)}th{background-color:#f8f9fa;font-weight:600;color:var(--text-muted)}.login-screen{display:flex;justify-content:center;align-items:center;height:80vh}.login-card{width:100%;max-width:400px}.message{padding:1rem;border-radius:var(--radius);margin-bottom:1rem}.message.success{background-color:#d4edda;color:#155724}.message.error{background-color:#f8d7da;color:#721c24}.loader{display:inline-block;width:20px;height:20px;border:3px solid rgba(255,255,255,.3);border-radius:50%;border-top-color:#fff;animation:spin 1s ease-in-out infinite;margin-right:8px}.tabs-nav{display:flex;gap:1rem;margin-bottom:2rem;border-bottom:1px solid var(--border-color);padding-bottom:1rem}.tab-button{background:none;border:none;color:var(--text-muted);padding:.5rem 1rem;font-weight:500;cursor:pointer;border-radius:var(--radius);transition:all .2s}.tab-button:hover{background-color:var(--border-color);color:var(--text-color)}.tab-button.active{background-color:var(--primary-color);color:#fff}.badge{padding:.25rem .5rem;border-radius:4px;font-size:.75rem;font-weight:600;text-transform:uppercase}.badge.success{background-color:#d4edda;color:#155724}.badge.warning{background-color:#fff3cd;color:#856404}@keyframes spin{to{transform:rotate(360deg)}}